can: m_can: m_can_chip_config(): actually enable internal timestamping

can: m_can: m_can_chip_config(): actually enable internal timestamping

In commit d9679b438a3b ("can: m_can: m_can_chip_config(): enable and
configure internal timestamps") the timestamping in the m_can core
should be enabled. In peripheral mode, the RX'ed CAN frames, TX
compete frames and error events are sorted by the timestamp.

The above mentioned commit however forgot to enable the timestamping.
Add the missing bits to enable the timestamp counter to the write of
the Timestamp Counter Configuration register.

Link: https://lore.kernel.org/all/20220612212708.4081756-1-mkl@pengutronix.de
Fixes: d9679b438a3b ("can: m_can: m_can_chip_config(): enable and configure internal timestamps")
Cc: <stable@vger.kernel.org> # 5.13
Cc: Torin Cooper-Bennun <torin@maxiluxsystems.com>
Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>